A5040693374- Advanced MRI Techniques and Applications
- Cardiac Imaging and Diagnostics
- MRI in cancer diagnosis
- Advanced X-ray and CT Imaging
- Cerebrovascular and Carotid Artery Diseases
- Atomic and Subatomic Physics Research
- Coronary Interventions and Diagnostics
- Intracranial Aneurysms: Treatment and Complications
- Advanced Neuroimaging Techniques and Applications
- Cardiovascular Function and Risk Factors
- Medical Imaging Techniques and Applications
- Cardiac tumors and thrombi
- Cardiac Structural Anomalies and Repair
- Ultrasound Imaging and Elastography
- Medical Imaging and Analysis
- Takotsubo Cardiomyopathy and Associated Phenomena
- Cardiomyopathy and Myosin Studies
- Venous Thromboembolism Diagnosis and Management
- Body Contouring and Surgery
- Civil and Structural Engineering Research
- Connective tissue disorders research
- Particle Dynamics in Fluid Flows
- Cyclone Separators and Fluid Dynamics
- Coronary Artery Anomalies
- Heat transfer and supercritical fluids
Ijinkai Takeda General Hospital
2024
Showa University
2024
Siemens Healthcare (Germany)
2017-2023
Tokyo Health Care University
2020-2023
Tohoku University
2018
Kyoto University
2010-2015
National Cerebral and Cardiovascular Center
2014
Philips (Finland)
2011
Siemens (Germany)
2009-2010
Abstract Aims To investigate the clinical impact of T1 mapping for detecting myocardial impairment in takotsubo cardiomyopathy (TTC) over time. Methods and results In 23 patients with apical ballooning type TTC, following 3T magnetic resonance (MR) examinations were performed at baseline 3 months after TTC onset: T2-weighted imaging, T2 mapping, native extracellular volume fraction (ECV), late gadolinium enhancement. Eight healthy controls underwent same MR examinations. Serial...
To assess the diagnostic performance of readout-segmented echo-planar diffusion tensor imaging (DTI based on rs-EPI) for breast cancer and to determine correlation between apparent coefficient (ADC) fractional anisotropy (FA) values obtained from DTI rs-EPI with prognostic markers invasive cancer.This retrospective study examined 80 pathologically proven lesions (22 benign 58 malignant lesions) patients who underwent both diffusion-weighted single-shot (DWI ss-EPI) b-values 0 1000. We...
Purpose To assess changes in left ventricular function and tissue composition by using MRI after chemotherapy–radiation therapy participants with esophageal cancer. Materials Methods Between January 2013 April 2015, this prospective study enrolled 24 (42% women; mean age, 63 years; range, 49–73 years) scheduled for therapy. 3.0-T examinations were performed before, at 0.5 year, 1.5 years Myocardial native T1, postcontrast extracellular volume measured basal septum (as irradiated areas)...
Purpose: Evaluate in vivo hemodynamic and morphological biomarkers of intracranial aneurysms, using magnetic resonance fluid dynamics (MRFD) MR-based patient specific computational (CFD) order to assess the risk rupture.
Free-running 5D whole-heart coronary MR angiography (MRA) is gaining in popularity because it reduces scanning complexity by removing the need for specific slice orientations, respiratory gating, or cardiac triggering. At 3T, a gradient echo (GRE) sequence preferred combination with contrast injection. However, neither injection scheme of gadolinium (Gd) medium, choice RF excitation angle, nor dedicated image reconstruction parameters have been established 3T GRE free-running MRA. In this...
Periprocedural myocardial injury (pMI) is a common complication of elective percutaneous coronary intervention (PCI) that reduces some the beneficial effects revascularization and impacts risk cardiovascular events. We developed 3-dimensional volumetric magnetic resonance (CMR) method to evaluate high intensity plaques investigated their association with pMI after PCI. Between October 2012 2016, 141 patients stable artery disease underwent T1-weighted CMR imaging before A conventional...
In magnetic resonance imaging (MRI) of the knee joint, when in a flexed position using chemical-shift-selective (CHESS) method, lingering fat signals popliteal region are sometimes seen.To investigate whether pad filled with rice (rice pad) placed space is effective eliminating MR images knee, based on hypothesis that use would improve suppression effect.Subjects were 10 healthy volunteers (five males, five females; age, 20-45 years) from whom taken CHESS. Images obtained with: 1) extended...
We aim to elucidate the effect of spatial resolution three-dimensional cine phase contrast magnetic resonance (3D PC MR) imaging on accuracy blood flow analysis, and examine optimal setting for using phantoms.The phantom has five types acrylic pipes that represent human vessels (inner diameters: 15, 12, 9, 6, 3 mm). The were fixed with 1% agarose containing 0.025 mol/L gadolinium agent. A blood-mimicking fluid property values was circulated through at a steady flow. Magnetic (MR) images...
Purpose: The accuracy of flow velocity and three-directional components are important for the precise visualization hemodynamics by 3D cine phase-contrast MRI (3D PC MRI, also referred to as 4D-flow). aim this study was verify these measurements prototype or commercially available obtained three different manufactures' MR scanners.
Background The histologic nature of coronary high-intensity plaques (HIPs) at T1-weighted MRI in patients with stable artery disease remains to be fully understood. Coronary atherosclerosis characterization (CATCH) enables HIP detection by simultaneously acquiring dark-blood plaque and bright-blood anatomic reference images. Purpose To determine if intraplaque hemorrhage (IPH) or lipid is the predominant substrate HIPs on images comparing CATCH scans findings near-infrared spectroscopy...
To investigate the feasibility of rice pads for improving nonuniform fat suppression in magnetic resonance imaging (MRI) neck, shoulder, and elbow using chemical shift selective (CHESS) technique.CHESS was performed on 10 healthy volunteers with without use pads. Images were visually assessed by one radiologist radiologic technologist a four-point scale. Results compared Wilcoxon's signed rank sum test.Images rated 3.9 1.5 neck (P = 0.002), 3.85 2.5 shoulder 3.4 2.45 0.004).Fat-suppressed...
Background: With the chemical shift selective (CHESS) method, lingering fat signals remain because of effects nonuniformity in magnetic field. One method to reduce this phenomenon is use pads filled with rice (rice pad), but improvement suppression pads, as compared conventional perfluorocarbon liquid remains unclear. Purpose: To investigate whether are superior improving resonance imaging (MRI) examination knee. Material and Methods: Subjects were 10 healthy volunteers (5 men, 5 women; aged...
We investigated whether a rice pad could be used to reduce the geometric distortion in echo-planar diffusion-weighted images of cervical spinal cord. In 10 healthy volunteers, we obtained sagittal plane using same imaging parameters with and without pad. Two reviewers classified visually assessed images. Use significantly reduced
High-intensity plaque (HIP) on magnetic resonance imaging (MRI) has been documented as a powerful predictor of periprocedural myocardial injury (PMI) following percutaneous coronary intervention (PCI). Despite the recent proposal three-dimensional HIP quantification to enhance predictive capability, conventional pulse sequence, which necessitates separate acquisition anatomical reference images, hinders accurate segmentation along vasculature. Coronary atherosclerosis T
Cine MRI derived from 3T contrast-enhanced free-running 5D whole-heart coronary MRA (free-running cine MRI) was compared with standard 2D in 30 patients suspected CAD. In a selected patient, temporal width optimized to 50 ms. Then, the remaining 29 patients, provided good agreement LV volume and function quantification inter-observer reproducibility. The results suggest that allows for shorter scan protocol by skipping MRI.
Purpose To clarify the predominant causative plaque constituent for periprocedural myocardial injury (PMI) following percutaneous coronary intervention: